Wood Finish Coverage Calculator

Summary

Calculate how much stain, polyurethane, oil, varnish, or paint you need for any woodworking project.

How it works

1. Enter the surface area directly in sq ft or sq m, or use the quick-calc fields (length × width × pieces × surfaces per piece).
2. Select the finish type — each type has a known coverage rate per quart.
3. Set the number of coats and an optional waste factor (default 10%).
4. The calculator outputs total finish needed in quarts, gallons, and liters, rounded up to the nearest purchasable unit.
5. Optionally enter a price per quart to get a cost estimate.

Use cases

• Estimate stain quantity for a deck, table, or cabinet project before buying.
• Compare how much polyurethane vs. danish oil you need for the same surface.
• Plan a multi-coat finish job and avoid buying too little or too much.
• Calculate total material cost when budgeting a woodworking project.

Frequently Asked Questions